Inventor
NISHITANI ICHIRO
JP9 patents
Patents
9 patentsUS6817802B2Nov 16, 2004
Writing instrument
KURETAKE CO LTD28 citations90
US6536969B2Mar 25, 2003
Writing tool equipped with ink reservoir
KURETAKE CO LTD16 citations82
US6807704B2Oct 26, 2004
Brush flatter and drawing instrument equipped with brush flatter
KURETAKE CO LTD11 citations71
USD472926SApr 8, 2003
Writing instrument
KURETAKE CO LTD10 citations71
US6439793B1Aug 27, 2002
Stippling instrument
KURETAKE CO LTD8 citations69
USD472925SApr 8, 2003
Writing instrument
KURETAKE CO LTD5 citations60
US11752796B2Sep 12, 2023
Tail plug and writing instrument
KURETAKE CO LTD0 citations48
US11472220B2Oct 18, 2022
Pen and pen refill
KURETAKE CO LTD0 citations48
US10081216B2Sep 25, 2018
Ink filling tool
KURETAKE CO LTD0 citations34